Error when submitting new version of extension: "Oops! We had an error"

I am trying to submit a new version of my Firefox extension, Clippings, through the AMO site. When the validation step finished, I clicked the button to continue to the next step, but am instead taken to an error page with the message: “Oops! We had an error.” As a result, I’m unable to complete the process of submitting the new version.

I’ve filed an issue in GitHub: [Bug]: "Oops! We had an error" message when trying to submit a new version of Clippings · Issue #16270 · mozilla/addons · GitHub

Thank you for your report! We are still investigating the cause of the issue. I saw that you also opened a GitHub issue. We are grateful! You can follow that for any updates, along with a separate discourse post we made: [incident in progress] "Oops! We had an error" at addons.mozilla.org